Day & Night Capacity Loss / System Undersizing or Performance Degradation

Outdoor unit runs continuously and cannot reach set temperature on hot days

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Dirty coils, Low refrigerant charge, Failing compressor with reduced capacity, Undersized Day & Night system for home load, Duct leakage

Safety first: Turn OFF power before cleaning coils.

Step 1 – Clean indoor and outdoor coils: Dirty coils significantly reduce capacity. Clean as per manufacturer instructions.
Step 2 – Filter and airflow: Replace filters and ensure all vents are open.
Step 3 – Shade and load reduction: Use blinds and reduce internal heat loads (ovens, lights) during peak heat.
Professional check: Have a technician verify refrigerant charge, compressor performance, and duct leakage if performance remains poor.

Medium 3/5

Condenser Coil and Evaporator Coil

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